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Thread: odd sounds!?

  1. #1

    Question odd sounds!?

    My blazer, when cold, starts up and drives with a loud (fan-like) sound. It stops after maybe a minute...is this something to be concerned about?
    Also, there is a light whining sound when the car is idle then gets slightly louder when accelerating. The sound seems to be from the engine, but unsure where exactly?

    Thanks for helping me build my automotive IQ.....

  2. #2

    Default

    The fan like sound at startup is just that, the fan is driven 100% until the silicone in the fan clutch warms up and the fan starts to slip.

    The squeel could be your belt tension idle pully or your alternator bearings, water pump...something driven. You can often locate which component by placing a long screwdriver near each one and placing your ear on the handle. Just be careful of the moving parts!
    Still Loyal to GM after all these years...:shocked:
    2006 Impala LT 3.5L
    2005 Silverado WT small cab/longbed 4x4 4.3L V6
    1999 Grand Am 3.4L in TX w/ our youngest
    1993 GMC Jimmy 4.3L 4 door 4x4 'Ole Rusty' - 'SOLD'
    1988 S-10 small cab/longbed HT3.4L Crate Engine
    1970 Nova 250 I-6, factory 3 sp floor shifter.
    1968 Chevelle 'Nomad' Wagon 250 I-6 w/ 3 on da' tree.

  3. #3
    Legend

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    Default

    the squeel could also ba a whole in the flex tube in the air intake, the fan sound coul also be the blower fan
    99 K1500 Suburban LT "THE BEAST"
    Hypertech III, K&N, true dual
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